Da-Ae, an aspiring comic artist, comes across Seon-Nam, a softie whose ultimate goal is simply to become a "tough guy." Seon-Nam is gradually attracted to Da-Ae, but it seems like the bond between them is turning out to be a curse. Da-Ae and Seon-Nam fall in love with each other, not knowing that they are connected by a complicated family history. Da-Ae's mother and Seon-Nam's father had an affair before they were killed in a car accident. On top of that, they also gave birth to Da-Ae's brother, Da-Wa!